Hydrodynamic modes in a trapped bose gas above the bose-einstein transition

A. Griffin, Wen Chin Wu, S. Stringari

研究成果: 雜誌貢獻期刊論文同行評審

94 引文 斯高帕斯(Scopus)

摘要

We discuss the collective modes of a trapped Bose gas in the hydrodynamic regime where atomic collisions ensure local thermal equilibrium for the distribution function. Starting from the conservation laws, in the linearized limit we derive a closed equation for the velocity fluctuations in a trapped Bose gas above the Bose-Einstein transition temperature. Explicit solutions for a parabolic trap are given. We find that the surface modes above the transition have the same dispersion relation as the one recently obtained by Stringari for the oscillations of the condensate at T=0 within the Thomas-Fermi approximation. Results are also given for the monopole “breathing” mode as well as for the m=0 excitations which result from the coupling of the monopole and quadrupole modes in an anisotropic parabolic well.

原文英語
頁(從 - 到)1838-1841
頁數4
期刊Physical Review Letters
78
發行號10
DOIs
出版狀態已發佈 - 1997
對外發佈

ASJC Scopus subject areas

  • 物理與天文學 (全部)

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